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The week ahead: Winter to burst onto the scene

Jason Samenow @ 1:57 AM

After today, the stage curtains will shut on 60+ degree temperatures, short sleeve shirts, snowless ski resorts and global warming speculation (but not appropriately according to Andrew's Undercast column yesterday). Much colder air arrives tomorrow setting the stage for a performance much more fitting for the season.


Forecast Confidence: HighA few PM showers, mild. The Arctic cold front will very slowly approach the area. Ahead of it, it will be mostly cloudy and mild, with highs in the mid 60s. Any rain shower activity will be widely scattered, and most likely after about 4pm (40% chance). Overnight, spotty shower activity remains possible (40% chance) as the cold front finally passes through the region late. Lows should be near 45.

The Upcoming Week at a Glance

Coldest Day: Wednesday and Saturday, High 31.
Warmest Day: Today, High 64.
Dry Days: Tuesday, Wednesday and the weekend.
Precipitation Chances: Today, Thursday night and Friday morning (30% chance).
The Week's Wild Cards: How cold will it be Wednesday and could there be a stray flurry? Will the coastal low Thursday night produce any precipitation? What type(s) of precipitation will fall? How cold will it be Saturday?
Climatological Average High/Low: 42/27


Forecast Confidence: Medium-HighBecoming windy and much colder. Tuesday's high will probably occur in the pre-dawn hours as temperatures will gradually fall through the 40s during the daylight hours. It will also be breezy, with northwest winds 15-30mph, making it feel even colder. The cold will really become noticeable Tuesday night, with lows 16-20 and winds continuing to gust between 15-25 mph resulting in windchills in the single digits.


Forecast Confidence: Medium-HighColdest day of the winter thus far? Very strong northwest flow and a significant Arctic airmass will likely result in windy conditions and temperatures not rising above freezing. Expect partly cloudy skies with highs 27-31. Overnight, the winds should subside but it will be very cold, with lows 13-20 (suburbs-city).


Forecast Confidence:Low-mediumIncreasing clouds, slight chance of wintry mix at night. As high pressure moves offshore Thursday, winds will turn southerly allowing warmer air to creep into the area with highs in the low 40s. At the same time, an area of low pressure may develop to the south, increasing cloud cover in the afternoon. Overnight, there is a 30% chance of rain, freezing rain or snow as the low pressure system moves up the coast with lows near 30. Details about this storm's impact and its mere existence are unclear -- but if something does materialize it should be fast moving with marginal cold air to work with due to the lack of cold high pressure to the north.


Forecast Confidence: Medium-HighChance of AM precip, becoming partly sunny. Any mixed precipitation should end early, with gradual clearing in the afternoon. It will be breezy and seasonably cool, with highs near 40. Overnight, as low pressure wraps up over eastern Canada, strong northwesterly winds in its wake will tap cold temperatures, with lows 15-20 (suburbs-city).

The weekend

Forecast Confidence: MediumVery cold Saturday, cold Sunday. Temperatures are likely to struggle to reach freezing on Saturday with strong northwesterly flow in place. Sunday, this flow will relax a bit, but it will probably still be chilly, with highs 35-40.

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